Update visual details for the creation intro page
Created by: vovakulikov
Follow up for https://github.com/sourcegraph/sourcegraph/pull/28978
Fixes by Alicja feedback from the last PR and from Slack threads
- update headers to 'track changes' and 'detect and track patterns'
- update the color of the headers and use case to body color in the light theme. Now, the color used is black (#0)
- update the charts used of the cards. I've made some changes regarding the alignment. New charts are available here
- thank you for the feedback regarding the extension icons. I think that 2.5 rem is too big - they look disproportional to other cards. I've increased the size slightly (to 28px) in the design. I think we should go with this size.
Also, I changed the layout of this page according to the experimental layout from @AlicjaSuska here
I also changed the width of the container here based on feedback from Alicja